Oil burner



Nov. 6, 1923.

G. H. MAHAN OIL BURNER Filed Aug. '7 1922 /L' jku/6222122 Zarge H Ma/aw @o @wanted Nov. 5, 1923.

GEORGE H. EAHAN, 01E' CHICAGO, ILLINOIS, ASSIGNOR TO GEORGE O. HOPE S'Ji GEORGE H. MAMAN, COPARTNERS DOING BUSINESS AS ATLAS OIL BURNER COM- PANY, OF CHICAGO, ILLINOIS.

OIL BURNER.

' application mea August 7, 1922. serial no. 579,953.

To all whom t may concern.'

Be it known thatl I, GEORGE H. MARAN, a citizen of the UnitedStates, residin at. Chicago, in the county of' Cook and tate of Illinois, have invented a certain new and useful `Improvement in Oil Burners, of which the following is a' full, clear, concise, and exact description, reference being-had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in oil burners and particularly to oil burners in'which kerosene, distillate or gas oil may be used. v

I am aware that it is old in the art to provide oil burners comprising a bowl and an arch extending diametrically across the same having` air intake openings at the front and back of the bowl -and a fuel supply opening 2 at the center of the arch. This construction is subject to the disadvantage of having the arch obstruct the rear of the bowl and thus preventing the iiames from being properly ,distributed over the 'rear of the interior of flames laterallv of the iirebox. The rear wall of the furnace or boiler is thus permitted to remain cool and the corresponding amount of heating surface not eciently utilized. The old construction interferes with the air freely entering the rear opening in the arch on account of the draft created through the forward part of the arch. y In my improved device, I have overcome these dithculties by extending the arch from the center of the bowl to the forward side only of the same, thereby getting the benefit of all of the available draft and preventing the obstruction of the ilames at' the rear of the bowl.

The object of my invention 'is to providev an oil burnerwliich is simple in construction and efficient in operation, and wherein an ample supply of air is provided to insure 5 complete combustion of the fuel. A further object of the invention is to so arrange the air intake of the burner that the full supply of air will be taken directly from the front of the furnace, closely adjacent to the ashpit doors and directly delivered to the center of the burner at the point where the oil is fed. Itis a further object of my invention to so construct the arch through whicli the air is conveyed to the burner that the greater part,'and especially the entire rear portion of the burner bowl will have no obstruction above the same to interfere with the free play of the `flames upon the fire pot walls. l

Other objects of the linvention will more clearly appear from the description and' ing by dotted lines, the front wall of a conv ventional furnace. Fig. 3 is a vertical section through the arch member taken substantially on the line V3--3 of Fig. 1. Fig. 4' is a front elevation of the burner and Fig. 5 is a sectional view similar to that shown in Fig. 2, of a modified construction of the burner.

In said drawings, 10 indicates the bowl of thcl burner, 11 the arch and 12 the supporting plate/on which the bowl and arch are a bottom and side wall 13, of generally curved concavo-convex form, terminating in a vertically extending wall 14 along the forward side. The bottom of the wall 13 has a. central conical raised` portion 1 5, centrally perforated at 16 to receive an oil feeding pipe 17, for conveying the oil to the burner. The bowl 1()V is provided with a circular downwardly extending flange at its bottom, indicated by 18, .which acts as an attaching means for holding the bowl in proper position on the supporting plate 12. The centrally located conical projection 15 forms an oilA distributing device whereby the oil fed through the vertically extending pipe 17 is caused to be properlydistributed in a film to provide for complete combustion of the held. The bowl 10 is of dish-shape, having #9 the fire box and causing the spreading of the same. The cone 15 has a stepped outer sur-v face 19, the steps of which are provided with grooves 20, thereby forming troughs to check or retard the flow of the oil down the face of the cone. The bowl 10 is also provided with means for preventing the overmsi with the upwardly and inwardly curved tubular portions `24, merging into a single downwardly curved tubular portion 25 which terminates in a vertical tubular portion 26 having its open end located een: trally above the bowl 10 and in axial alinelnent with the oil pipe 17. The tubular portions 23 are provided at their lower ends.-

eech with a downwardly extending lug` 27 and a horizontally extending lug 28. The lugs 27 and. 28 provide suitable means for attaching the arch to the supporting plate 12.

' The supporting plate 12 is provided with a central recess 29 which snugly `receives the flange 18 on the bottomot the bowl 10 to hold the same in proper position. The sup lporting plate 12 is also provided at the'forward side with two recesses 30, of the same general outline as the lower ends of the tubular members 23. These openings are of such a size as to provide an abutment-31 for the lower ends of .the tubular portions 23. At the forward end ot the recesses 30, are provided U-shaped strap portions 32 adapted to receive the lugs 28 of the tubes .23. 1t will be noted that the lugs 27 and 28 co-acting, respectively, with the inner walls of the recesses 30 and the U-sha ed strap portions 32, will hold the arch memv er in properly supported assembled relation on the plate 12.

As shown in Fig. 2, the burner is so arranged within the furnace, the front wall 'Y of which .is indicated by dotted lines in said in" that the supporting plate 12 is replaced by a-cylindrical support T21. The bowl 110 lis 'of substantially' the same construction Vas the bowl/,10 with the exception that an abutment is provided at the upper end of the wall 114 to support the lower end of the tubular members 123. rllhe tubular members 123 are provided with lugs 127 and 123,

which cosact with the wall 114 and a U4` shaped strap 132 on the bowl 110 and the cylindrical support 121, respectively, thereby holding the arch 111 lin assembled relation to the support 121. The cone 115 is 'of similar construction to the cone shown Lin the preferred form, differing only in that fewer steps are provided. The te'ed pipe 117 connects with the opening at the upper Lamaze end of the cone 115, similarly to the construction shown in Fig. 2, and an oil overflow drain pipe 121, communicating with au opening 122, is also provided to prevent overlio'wing of the bowl.

In using my burner. oil is fed through the pipe 17 by gravity, although other means may be provided for feeding the oil. In connection with the oil feed line, the usual thermostatically controlled needle valve is provided, to properly control the flow of the oil according to the temperature desired. The oil passing through the pipe 17 flows over the top of the cone 15 and down the stepped portions 19, a small quantity of the oil being retained in each of the troughs 20, during the downward flow of the same,

to cause a proper distribution ot' the pil circumferentially of the cone substantially as a film.. The air is admitted through the openings in the lower ends' of the tubular portions 23 of the arch 11, passing along the same to the terminal end of the arch, comprising thetubular portion 26 located axially w1th reference to the oil feed pipe 17. y this means a strong draft of air is induced directly downwardly over the cone and is properly spread by the same to insure completel combustion of the oil being distributed over the outer face of the cone. In this connectionjit will be noted that a very strong draft is providedA at the 'ortlet end of the arch, due to the lar e arca of the combined intake openings att ie lover ends of the tubular members 23 of the arch. It will also be seen that as the inlet openings of the arch are located immediately adjacent the ash pit doors 34, there will be no obstruction to the free entrance of the air. l The concave construction of the bottom wall of the bowl 10 provides for a proper deflection of the flames ,upwardly as the draft is directed downwardly along the conical walls otl the projection 15 and upwardly along the curved walls of the bowl.

As heretofore indicated, my improved burner is adapted to be used in furnaces, boilers, etc. particularly those used for d0- mestic purposes. As 1s well known, that portion of the fire pot wall on the front side of the heater adjacent the `feed and ash pit doors, does not obtain the same high temperature asdo other portions oi the -f're box wall, land especially the rear portion which, in most instances,r is the most efficient portion of the fire box in heating either the circulating air or water, whichevcr it may be. With my arrangement, I

bring the intake ends of the arches or air ducts as closely adjacent thefront portion of the tire pot walls, as possible, so thatthere isin edect, no appreciable decrease in the effective radiation obtained from such front portions of the tire pot wall, and I leave the'maior 'portion of the bowl, including strong draft downwardly over the surface of of oil may be automatically out olf b t .off through the drain pi e 21.

the'back portion thereof, free and unobstructed so that the flames of-combustion may be deflected against the greater part of the fire potfwalls and. in particular, against those portions which are the most efficient in radiating heat. `In actual practice, each intake opening of lthe arches or air ducts willbe made of an area approximately equal to the area of the discharged end of the merged arches s'o as to insure a the stepped cone.

In the normal operation of the burner, the oil flowing over the cone .l5 will be consumed before it reaches the bottoni of the cone. but should the burner for any reason be accidentally extinguished, the oil will be prevented from overflowing the bowl by passing out through the opening 22 upon reaching the level of the same and passing In the preferred construction, the t rain pipe 21 is'eonnected to a proper safety valve mechanism for cutting off the supply of oil to the feed pipe 1T. It will thus be seen that the supply yns means when the burner is accidental y extinguished.

My burner is capable of vsuccessfully burning :erosene which has a specific gravity of approximately 47,' distillate having a specific gravity of approximate-ly 38 and gas oil having a specific Gravity of about 36.

All the parts of my burner are preferably constructed of gray cast iron.

I have herein shown and described what I now consider the preferred manner of' carrying out my invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims appended hereto.

I claim:

lAs an 'article of manufacture, an oil burner adapted to be used in furnaces and other heaters having the usual door openings in the front thereof, said oil burner com rising, a bowl with a concave npper'faoe ad) apted to be placed approximately inthe center.

of the tire pot of the heater, said bowl having an upwardly projecting cone-shaped fuel distributor in the center thereof; means for supplying and delivering fuel at the top of said cone-shaped distributor to permit the fuel to flow downwardly over the distributor; and means for supplying air to combine with the fuel, said means including a mem'- ber having an air delivery opening disposed over the top of the cone distributing means and intake openings disposed at the front of the bowl and adapted to be positioned immediately adjacent the front of the heater, the

point where the fuel isdelivered, comprising an arch member havin two branches merging into a single terminal portion located above the receptacleand in alinement with the point where the fuel is delivered,

each of said branches extending toward vthe front of the receptacle and terminating be'- `vond the outer edge of the same and adapted to be positioned immediately adjacent the fire box and ash pit doors of the furnace,

said branches eachbeing provided with an air passage extending from end to endend merging into a single outlet at saidterminal of the arch, the combined areas of the intake openings of said passages being greater than the area of the outlet opening.

In witness that I claim the foregoing I' have hereuntorsubscribed my name this 28 day of July, 1922.

GEORGE H. MAHAN.

lVitnesses:

UNA C. GRIGSBY, ANN BAKER. 

